91.   Similar tit-for-tat attacks wrecked all previous attempts at establishing a cease-fire, and any such effort would be extremely fragile.

92.   Some of the potential upheaval can be gleaned from what happened to previous attempts to extend hours.

93.   Such research is precisely the point of this joint US-Russian mission, far more ambitious than any previous attempt at international cooperation on a space venture.

94.   The child had watched the scenes on television of people being beaten by policemen on horseback in the previous attempt to march across the bridge at Selma.

95.   The boy apparently had witnessed a previous attempt by Peeler to kill Snead, the law enforcement officials told the newspaper.

96.   The company had failed in two previous attempts.

97.   The Dr Pepper board approved the merger with Cadbury Thursday, a reversal of previous attempts to fend off overtures from Cadbury.

98.   The government made several previous attempts to auction Banespa, but trade unions and bank employees blocked the sale.

99.   The remaining eight positions will be determined by a formula that factors in series champions, race winners and the number of previous qualifying attempts.

100.   The response to the attacks stands in sharp contrast to many previous attempts to forge a transnational front against crime.